baber/WOPTO huggingface dataset:
Patent GB-190246-A (GB)
Title: Improvements in or relating to the treatment of copper ores
IPC: C22B15/00
Filed: 1921-09-16
Abstract: Copper ores such as porphyries containing some non-oxidized copper including copper sulphide, with or without antimonides, arsenides, or phosphorus compounds of copper, and with or without oxidized copper compounds, are oxidized by roasting at about 350 DEG -600 DEG  C. or even up to 700 DEG  C. so as to oxidize the non-oxidized compounds, the copper sulphide being converted to sulphate or basic sulphate so far as possible, while any iron sulphate formed is decomposed.  The oxidized product is then reduced by heating in a reducing gas at 300 DEG -400 DEG  C. and leached with a solution of ammonia preferably containing carbonic acid with access of air, so as to dissolve the copper.  The copper is recovered from the solution by boiling off the ammonia, a basic substance capable of yielding a soluble sulphate being added if necessary to decompose any sulphate present.  The reduction and leaching may be effected as described in Specification 185,242. In an example, a South African copper ore is roasted for 1 1/4 hours at 400 DEG  C. then for 2 1/4 hours at 500 DEG  C and then for 1 1/2 hours at 525 DEG  C., the product being reduced in coal gas at 325-350 DEG  C.ALSO:Copper ores such as porphyries containing some non-oxidized copper including copper sulphide with or without antimonides, arsenides, or phosphorus compounds of copper, and with or without oxidized copper compounds, are oxidized by roasting at about 350-600 DEG  C. or even up to 700 DEG  C. so as to oxidize the non-oxidized compounds, the copper sulphide being oxidized mainly to sulphate or basic sulphate while any iron sulphate formed is decomposed.  The oxidized product is then reduced by heating in a reducing gas at 300-400 DEG  C., and leached with a solution of ammonia preferably containing carbonic acid, with access of air, so as to dissolve the copper.  The copper is recovered from the solution by boiling off the ammonia, a basic substance capable of yielding a soluble sulphate being added if necessary to decompose any sulphate present.  The reduction and leaching may be effected as described in Specification 185,242.
Patent GB-448210-A (GB)
Title: Improvements in and relating to electric discharge rectifiers
IPC: H01J17/04
Filed: 1935-09-04
Abstract: 448,210. Converting. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, Emmasingel, Eindhoven, Holland. Sept. 4, 1935, No. 24706. Convention date, Sept. 5, 1934. [Class 38 (ii)] [See also Group XL] A gas- or vapour-filled rectifier is provided with at least two groups of anodes wherein at least one group is furnished with means to increase its blocking voltage above that of other groups and one of the groups is connected in accordance with the required output voltage to a polyphase supply by means of a switching device. Groups of anodes 13, 15 for charging low- and high-voltage batteries 21. 19, respectively, are adapted to be connected to tappings on the secondary winding of a transformer 2 in such manner that only one group can be connected in circuit. A cathode 17 is connected to a winding 4 the centre point of which is connected to one end of the battery 19 or 21. The switches may be mechanically connected together and the blocking voltage may be increased by means of wire screens which surround the anodes. To facilitate ignition or control the anode arms may comprise portions of ferrochromium. An auxiliary discharge may be utilized to neutralize the electric charges which occur at the openings in the anode arms.
Patent GB-389092-A (GB)
Title: Improvements in or relating to filters or separators
IPC: B01D39/14
Filed: 1931-09-03
Abstract: Edge filter elements are formed of alternate sheets of woven fabric or cloth and paper, both fabric and paper being treated with a synthetic resin or similar condensation product, which may be applied in the form of a varnish to which phenol and creosote have been added.
Patent GB-1381573-A (GB)
Title: Device for the detection of moving objects
IPC: G01P13/00
Filed: 1973-05-24
Abstract: 1381573 Photo-electric object detection PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd PHILIPS GLOEILAMPENFABRIEKEN NV 24 May 1973 24835/73 Heading H4D A device for moving object detection comprises an optical imaging system and four separate detection elements arranged in line, the elements being connected in such a way that their combined output signal comprises two pulses, one positive, one negative, for the passage of each of the leading and trailing edges of the object image over the elements. In the emoodiment of Fig. 1b, holometers B1 to B4 are connected to voltage sources 3 via resistors 4. The output of the combined detectors is passed to an amplifier 5. Fig. 2 illustrates the output signal of the device as an image passes over the detectors. In this case the image is that of the earth and the device is situated on a satellite. The first positive and negative peaks are caused by the leading edge of the image travelling over the detection elements while the second peaks are due to the trailing edge of the image. The dotted curve is the signal obtained if the time for the image to cross each holometer is of the same order or shorter than the time constant of each bolometer. Further embodiments are illustrated in Figs. 6 to 8 (not shown) and a logic circuit for processing the signal from amplifier 5 is illustrated in Fig. 4 (not shown). The further embodiments utilize photo-cells or photodiodes as the detection elements.
Patent GB-156893-A (GB)
Title: Improvements in or connected with the manufacture of beds and other metallic furniture
IPC: A47C19/02
Filed: 1919-10-11
Abstract: 156,893. Wessbecher, A. Oct. 11, 1919. Tubes.-Perforated tubular elements for metallic bedsteads or other furniture, are formed by perforating a flat strip, using an edge for a guide, and then bending the strip to form a hollow element of the desired cross-section, or by first bending up the strip along a line or lines to form one or more ridges or angles, and using a ridge as a guide while forming the perforations. The edges 5, 6 of the strip may be autogenously welded together. Fig. 6 shows a tubular element in course of formation, Fig. 7 a completed tubular element, while Fig. 5 shows the method in which the elements may be connected together.
Patent GB-996231-A (GB)
Title: Method of and apparatus for continuous catalytic cracking of readily volatile hydrocarbons
IPC: C01B3/38
Filed: 1963-06-24
Abstract: <PICT:0996231/C4-C5/1> In a process for the catalytic cracking with steam of volatile hydrocarbons to make a fuel gas, some at least of the steam, and the or some of any air in the reaction mixture, are heated separately of the hydrocarbon vapours to 800 DEG  to 850 DEG C. in a catalyst-free zone 2 of an externally heated tube 1, the hydrocarbon vapours being separately heated only to a degree first short of thermal decomposition, the heated reaction mixture constituents being quickly mixed in a zone 9 before entering the catalyst zone 3.  Steam enters at 6 and hydrocarbons, preheated e.g. to 300 DEG  C., at 7, and air, if any, enters at 5.  Some steam, e.g. 20% to 40% of the total, may be delivered with the hydrocarbons at 7 to control the heating thereof.  The exothermic reaction in the region 10, 9 causes a rapid temperature rise there and militates against the formation of polymerizates, even at pressures of 3 to 15 atmospheres.  Instead of being delivered separately, the air may be mixed with steam for delivery at 6.
Patent GB-1352263-A (GB)
Title: Process for making duplicates of film
IPC: G03G15/22
Filed: 1971-04-19
Abstract: 1352263 Contact printing ADDRESSOGRAPHMULTIGRAPH CORP 19 April 1971 [22 May 1970] 25263/71 Heading G2A A method of maintaining intimate contact between an original and duplicate during exposure comprises feeding a film strip original not in sheet form and a light-sensitive film strip having an electrical resistivity of at least 10<SP>12</SP> ohm cm. to an exposure station from separate supply stations, bringing the strips into contact at a location in advance of the exposure station and applying at or adjacent the location an electrostatic charge to the surface of one or both strips so that they are electrostatically attracted. Apparatus for carrying out this method is disclosed in Specification 1352264.
Patent GB-448976-A (GB)
Title: Improvements in methods and devices for recording sound on photographic material
IPC: G11B7/00
Filed: 1935-09-11
Abstract: 448,976. Optical sound - recording processes. LEER, J. O. VAN, Wavo Park, Wassenaar, Holland. Sept. 11, 1935, No. 25299. Convention date, Aug. 23. [Class 40 (ii)] In a process for optically recording sound in which the blackening of the recording material of a film is determined by the light to which the recording material is exposed, the wavelength of the light by which the exposure is made is caused to vary in accordance with the sound to be recorded as a result of the movement of a spectrum or part of a spectrum thrown on the film through a slit, the recording material having a sensitivity which is a function of the said wavelength. The spectrum may be moved over the slit in various manners. Thus, as shown in Fig. 1 in which the slit is represented by the rectangle drawn in full lines and the spectrum by the rectangle in dotted lines, the violet end of the spectrum being indicated by V and the red end by R, the spectrum is moved in the direction of the arrow. Bv means of filters, the intensity of the different colours may be varied with regard to each other and adapted to the non-linear shape of the sensitivity curve of the film. Fig. 2 shows another manner in which the spectrum may be moved with respect to the slit. According to a modification of the arrangement shown in Fig. 2, the spectrum may be cut off diagonally by means of a diaphragm, Fig. 3 (not shown), whilst Fig. 4 shows a still further modification by means of which a linear effect is obtained with a non-linear sensitivity curve and a linear displacement by bounding the spectrum in a non-linear manner so that the non-linearity of the sensitivity curve of the film emulsion is compensated.
Patent GB-922899-A (GB)
Title: Improvements in or relating to time controlled actuating mechanisms
Inventor: BOWEN TOM
IPC: G04F3/02
Filed: 1958-08-07
Abstract: 922,899. Time-switches. S. SMITH & SONS (ENGLAND) Ltd. July 24, 1959 [Aug. 7, 1958], No. 25419/58. Class 38 (5). [Also in Group XXIX]  The start and finish times of, e.g. a cooking operation are controlled respectively by relatively adjustable cams 25, 24 which are engaged by a follower 23 moved along the cams by a timeactuated member 31. The follower 23 is fixed to a rack 12 movable in a guide 13 in an angularly-movable support 10, the follower being urged into engagement with the cam faces by springs 14. The rack has one set of teeth engaging a pinion 16 and a set 33 engaging a pinion 17 on a spindle 18 carrying a contact-actuating cam 19. The switch is set as follows: (a) knob 28 is turned anti-clockwise to rotate a setting arm 29 which engages a projection 26 on cam 25 which is then rotated until faces 2, 5 in the cams coincide. In this position, the follower 23 moves outwardly to engage these faces and move the switch on. At the same time, pinion 16 is moved counter-clockwise by rack 12 to bring, a projection 22 close behind arm 29; (b) further anti-clockwise movement of arm 29 continues, resulting in rotation of both cams and the follower, until the finish time is set; (c) the arm 29 is then turned clockwise and by engaging projection 22 turns pinion 16 clockwise and retracts the rack 12 and follower 23. This opens the switch. Continued rotation of arm 29 moves the follower 23 against face 4a of cam 25 and turns this clockwise to the start position, leaving cam 24 stationary. When knob 28 is released, springs 14 push follower 23 against face 4 of cam 25 and the timeoperated arm 31 eventually picks up the follower and rotates it anti-clockwise. When the follower slides down face 6a on to face 1, the switch is closed, being re-opened when the follower reaches face 3a and engages face 6.
Patent GB-1422874-A (GB)
Title: Teaching aid employing magnetic tape recording
IPC: G09B5/06
Filed: 1973-05-29
Abstract: 1422874 Tape cassettes A F RUDD and J A RUDD 27 June 1973 [29 May 1973] 25421/73 Heading B8M Part B A magnetic tape 18 having legends 20 on one side corresponding to the recorded sounds is guided in a cassette 12 so that during tape transport the legends 20 are visible through one or more windows 16 in a major face of the cassette. The window(s) may be adjustable by means of a slider 22 and may comprise a magnifying glass (52), Fig. 6 (not shown), and the tape may be illuminated.
Patent GB-754929-A (GB)
Title: Apparatus for preventing the wilting of plants and for restoring plants to full freshness
IPC: A01G5/06
Filed: 1950-10-19
Abstract: 754,929. Preserving vegetables, fruit and flowers. GOLD, R. L., and FROESCHEL, P. Oct. 19, 1951 [Oct. 19, 1950], No. 25498/55. Divided out of 754,821. Class 49. Apparatus for treating plants, i.e. vegetables, fruit and flowers, in order to effect infiltration of water into the intercellular spaces comprises an open container for the plants submerged in water, a rigid plate closure for the container, having, on the underside, a sealing member for airtight engagement with the container rim and having on the upper side, an air withdrawal pump mounted integrally with the plate closure, and an air passage from the underside of the closure to the pump. In the apparatus of Fig. 3, a container 209 for the plants and water has a lid 206 on which is a jet pump 200, and from the throat 204 of the pump is a hole 205 through the lid. Air is withdrawn from the container on delivering water by a pipe 201 through the pump. Stopping this water flow causes re-entry of air to the container and reduction of vacuum therein, and changes of pressure in the container are repeated until the plants are sufficiently infiltrated with water. In the apparatus of Fig. 5, a container 229 for the plants and water has a lid 210 with a rubber washer 211 on its underside and a hand pump 215 on its upper side. On pulling the handle 222 of the pump piston, air is withdrawn from the container by way of a hole 212 into a passage 223, through a slit 224 in a shouldered rubber valve 225, and out into the atmosphere by way of a hole 226 in the pump barrel ; on the return stroke of the handle 222, the slit 224 closes, and air in the pump passes a leather cup 217 round the piston. After evacuation of the container to the extent required, a release screw 227 is opened to allow air from the atmosphere through the passage 223 into the container. The production of vacuum and the release of vacuum are repeated until the plants are sufficiently infiltrated with water. For each apparatus, the unused water is poured off, and the plants are then superficially dried by replacing the lid and evacuating the container or by transferring the plants to a centrifuge.
Patent GB-1388155-A (GB)
Title: Transfer foils
IPC: B41M5/00
Filed: 1972-05-31
Abstract: 1388155 Coated sheet materials GEORGE M WHILEY Ltd 13 March 1973 [31 May 1972] 25554/72 Heading B2E [Also in Division B6] A transfer foil comprises a carrier sheet, a release layer on the carrier sheet, a transferable layer on the side of the release layer remote from the carrier sheet, and on that side of the transferable layer remote from the release layer a layer of adhesive which is capable of becoming tacky when heated and remaining tacky after removal from the heat source and after return to its original temperature. The transferable layer can be metallised, e.g. bright or matt gold or silver, bronze or aluminium powder, lacquered aluminium or real gold, pigmented, patterned, e.g. wood grain or a multi-colour design which can be random or register printed. The carrier sheet may comprise paper, regenerated cellulose or polyester. In a typical example polyethylene terephthalate film was coated by gravure printing with a solution of an ester wax release layer, and subsequently coated with a lacquer containing nitrocellulose, a butyl/methyl methacrylate copolymer and a dye by gravure printing, followed by vacuum deposition of an aluminium film on to the dried coating, application of an intermediate adhesive layer containing polyvinyl butyral, polyvinylacetate by gravure printing, and finally a prolonged tack adhesive layer comprising polyvinyl acetate, partially dimerised rosin by gravure printing. In Example 2 the prolonged tack adhesive comprises neoprene, chlorinated paraffinic hydrocarbon and an acrylic copolymer.
Patent GB-1508066-A (GB)
Title: Vessels having twin hulls
IPC: B63B1/10
Filed: 1975-06-16
Abstract: 1508066 Catamaran vessels J J STENGER 16 June 1975 [18 June 1974] 25595/75 Heading B7A A catamaran vessel has an opening in the stern with a removably hingedly mounted stinger 9, e.g. for pipe laying, located therein, the stinger having tracks (10) Fig. 5, not shown, for a movable device. The stinger is formed from hollow tubes 14 interconnected by transverse tubes so that it is buoyant, and is located by means of conical end portions (17) Fig. 6, not shown, which locate a transverse cylinder 8 which is rotatable about a horizontal axis. The stinger has rollers (21) below the tracks (10). A stern bridge 6 supports a control cabin 7. The opening can be closed by hatch covers. A hoist 12 can move along the deck of the vessel.
Patent GB-805488-A (GB)
Title: Improvements in or relating to pistons for vacuum brake cylinders
IPC: B60T17/08
Filed: 1956-08-23
Abstract: 805,488. Vacuum brakes. STABEG APPARATEBAUGESELLSCHAFT. Aug. 23, 1956 [May 28, 1956], No. 25717/56. Class 103 (1). [Also in Group XXVI] A vacuum brake cylinder-and-piston device comprises a piston 3 in the form of a dish-like plate which is spaced from the cylinder wall 2 and is rigidly connected, through a hub-like central part 15, with the end of a tubular piston-rod 6 slidable on a centring bolt 8 attached either to an outer casing 7, Fig. 1, or to the centre of a spider 24, Fig. 2, secured to the cylinder wall itself; the bolt 8 provides the sole guidance of the piston 3 within the cylinder 2. The piston 3 carries a packing which may be of the sealing-lip type described in Specification 752,324, [Group XXVI]. Resilient washers 21, 22 are fitted respectively over the piston-rod 6 and at the attachment of the bolt 8 to its supporting member to absorb shocks at the abutting faces of the piston 3 and the bolt 8 as a stop-bolt 13 reaches its terminal position. The piston may be provided with stiffening ribs 23 and, if desired, may operate against a return spring 14 surrounding the bolt 8.
Patent GB-1585152-A (GB)
Title: Method and apparatus for profiling a grinding wheel
IPC: B24B53/053
Filed: 1978-05-31
Abstract: The grinding wheel (1) to be profiled is arranged on a carrier (13) and driven by a motor (2). The carrier (13) is fastened on an optical projection-form grinding machine such that the point of engagement of the grinding wheel (1), to be profiled, and the profiling grinding wheel (14) of the projection-form grinding machine is located in the region of the axis (7) of the optical imaging system (16, 17, 18). The mutual position of the two grinding wheels (1, 14) is changed, using the imaging of the point of engagement, corresponding to the desired profiling by means of the pivot lever (20). This makes possible the high-precision profiling of a grinding wheel (1) with any profile using a single profiling grinding wheel (14). <IMAGE>
Patent GB-616200-A (GB)
Title: Improvements in and relating to the insulation of electric inductive apparatus
IPC: H01F27/22
Filed: 1946-08-29
Abstract: 616,200. Transformers and inductances. BRITISH THOMSON-HOUSTON CO., Ltd. Aug. 29, 1946, No. 26000. Convention date, Oct. 29, 1943. [Class 38 (ii)] A transformer or inductance is embedded in magnesium oxide which has been electrically fused and powdered. In a previously stored transformer in which the core yokes 4 are fixed by angle irons to the casing walls 5, 6, the hot magnesium oxide is introduced through a side opening 9, so that the flow of powder is parallel to the axes of the coils. Settling may be obtained by vibration during filling and the remaining interstices may be filled by mineral oils, pyranols, paraffin wax or a mixture of resin and " Vaseline " (Registered Trade Mark), through tubes 13 with lower openings facing the sides of the casing. When plugs 15 close tubes 13, these form expansion chambers. The cover 12 may have internal cooling fins 11. External fins are also mentioned.
Patent GB-144946-A (GB)
Title: Improvements in joints or connections for tubular articles
IPC: F16L27/047
Filed: 1919-10-24
Abstract: 144,946. Harper, Sons, & Bean, A., and Pearson, D. A. Oct. 24, 1919. Stuffing-box joints. - In connecting pipes, and particularly in connecting an exhaust pipe to a silencer, a ring, Fig. 5, which is of spherical outer contour and is slit from the centre to the rear edge f is slipped over the pipe b, Fig. 2, which is then inserted into the socket. The part e contacts with the conical or complementarily shaped inner surface of the socket portion, and the whole is clamped by the nut g, which has an inner shoulder curved complementarily to the ring, the split portion of the ring being thus forced on the pipe b. Figs. 3 and 4 show how variations in length and alinement may be accommodated.
Patent GB-423348-A (GB)
Title: Improvements in ridge and valley tiles
IPC: E04D1/30
Filed: 1934-09-12
Abstract: 423,348. Roof tiles. BROWN, T., Carswell House, Rodings Lane, Ilford, Essex. Sept. 12, 1934, No. 26154. [Class 87 (i)] Ridge and valley tiles adjustable to any angle to suit the roof consist of wing tiles 1 interlocking and hinging along the apex by projections 2 and intermediate gaps, and a separate roll or capping 3 formed with curved contacting edges 5, 6. Fig. 11 shows a valley tile.
Patent GB-155951-A (GB)
Title: Improvements in or relating to oilers and the like
IPC: F16N3/04
Filed: 1919-10-24
Abstract: 155,951. Garside, J. Oct. 24, 1919. Lubricating-cans.-A lubricating-can has a spring-pressed valve GG operated by an arm F secured to a rotatable tube E mounted in an outer fixed tube D. The tubes have filling-openings which are brought to register by moving the arm F away from the handle O. The tubes also have air-inlets which are brought into register when the arm F is depressed to open the valve. The container has soldered, brazed, or welded seams or joints. A guide K is provided for the valverod G. The tube D is attached to a tray C secured to the top of the container.